269 SWR 51 147 NX 4L ALP 4 ohm

Parameters: Free air Common Baffled

Nominal impedance Zn (ohm) 8

Minimum impedance/at freq. Zmin (ohm/Hz) 4.9/115

Maximum impedance Zo (ohm) 53.3

DC resistance Re (ohm) 3.4

Voice coil inductance Le (mH) 4.3

Capacitor in series with 8 ohm

(for impedance compensation) Cc (µF) 22

Resonance Frequency fs (Hz) 18.9 18.9

Mechanical Q factor Qms 2.63 2.63

Electrical Q factor Qes 0.18 0.18

Total Q factor Qts 0.17 0.17

F (Ratio fs/Qts) F (Hz) 112

Mechanical resistance Rms (Kg/s) 6.12

Moving mass Mms (g) 135.3 135.4

Suspension compliance Cms (mm/N) 0.52

Effective cone diameter D (cm) 21.2

Effective piston area Sd (cm²) 352

Equivalent volume VAS (ltrs) 89.7

Force factor Bl (N/A) 17.5

Reference voltage sensitivity

Re 2.83V 1m at 115 Hz (Measured) (dB) 88.4

Voice coil diameter d (mm) 51

Voice coil length h (mm) 33

Voice coil layers n 4

Flux density in gap B (T) 1.04

Total useful flux (mWb) 2.50

Height of the gap hg (mm) 8

Diameter of magnet dm (mm) 147

Height of magnet hm (mm) 35

Weight of magnet (kg) 2.42

XTRA-LONG-STROKE

By introducing the new range of Xtra Long Stroke (XLS) subwoofers, Peerless has pushed the performance limits for

subwoofers to a new level. The XLS/subwoofer range will fulfil every demand for deep clean bass reproduction in high

SPL applications. In the design, the emphasis has been put in achieving extreme deep bass, long time reliability, high

power handling, and very low distortion - even under very large sound pressures. The 10" XLS has also been designed

to fit smaller cabinet configurations, ideal for car audio applications. This is a new range from Peerless to suit the

unlimited demands of bass hungry enthusiasts in automotive audio sound offs. Double magnet. Cast iron frame. Large

rubber surround. Gold 4mm binding posts. Rubber boot over the magnet to reduce box turbulence. Dust cover badged.

BEWARE! The amplifier driving this speaker must be 2 ohm stable. Do not parralel or BTL without caution.

Code 830452

830515

CAR AUDIO SUBWOOFER 12" XLS 4 ohm

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310mm 125mm

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830515

CAR AUDIO SUBWOOFER 12" XLS 4 ohm

A. Aluminum Spacer:

B. Black Anodized Voice Coil :

C. Stacked Magnet System:

D. Distortion Reduced Motor:

E. Vented Cone:

F. Nomex® Spider:

G. Rubber Surround:

H. Fiber CompositeCone:

I. Rigid Cast Aluminum Basket:

The aluminum spacer serves as heat sink for the coil to reduce power compression.

The 2-inch 4-layer voice coil is wound on thick black anodized aluminum for improved

heat dissipation.

The twin stacked magnetic system is optimized by FEA (Finite Element Analysis), to create

a symmetric powerful magnetic field in the air gap, and provide space for the 44 mm max excursion of the voice coil.

A long 4 layer voice coil normally results in high self induction and impedance varying

with excursion. Its many ampere turns react on the magnetic field in the air gap. These two main factors causing motor

distortion in subwoofers are practically eliminated by the combined impact of the Aluminum Short Circuiting Ring (D)

and the Aluminum Spacer (A) on the pole piece. At the same time they both contribute as heat sinks for the voice coil,

reducing power compression. The result is unbelievable clean bass reproduction.

To eliminate compression under the dust cap the cone is vented by 8 large holes. This way the coil is

cooled and there is no need for a bore in the pole piece.

The spider is made of high tech Nomex® material. This material is chosen for its high rigidity and

long term stability. The suspension will stay in shape for a very long time under heavy load.

The surround is made from SBR rubber because of the wide operating temperature, low creep and

long term reliability.

The cone is molded from a propriety air dried wood free pulp with a blend of Nomex®,

Kevlar® and glass fibers bonded together by deep impregnation with polymers.

This creates an ultra stiff and relatively light cone that will stay stable even under very large sound pressures.

The rigid cast basket with an aerodynamic profile provides the necessary sturdy base

for the magnet structure and suspension and allows for the 44 mm max excursion of the cone. The spider is ventilated to

achieve the lowest possible compression and allow air to flow freely to create a cooling effect for the voice coil.

CAR AUDIO APPLICATIONS

The 830515 was developed for premium quality audio

that will perform outstandingly, no matter how small the

enclosure! A sealed box, with heavy fill damping, as

small as 1ft including speaker displacement, that's about

30 litres, will produce excellent punchy sound. Ideal for

Rock'n'Roll or Electronica type music will impress.

Outstanding, clean, rock solid and tight without the

boomy, muddy sound we have gotten used to from a

previous generation subs. Larger boxes and ported

designs will produce lower bass frequencies, however the

wavelengths are longer than the car is, so you simply

wont hear it. Port tuned cabinets can give better

performance and more efficiency, however they are more

critical to design, and port noise is prenominal unless you

tapper everything! The best compromise came from a

30L per driver sealed box. You will find the 830515 will

give performance you did not think possible from such a

small driver in such a small enclosure!

3

BEWARE ! The 830515 is rated at 4 ohm, however

at resonance the impedance can drop down below 3

ohm. ie. make sure your amp is 2 ohm stable and DO

NOT run the 830515s in parallel or BTL (unless you

are 1 ohm stable !)